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 Radioactive contamination in the Tokyo metropolitan area in the immediate aftermath of the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident was analyzed via surface soil sampled during a twomonth period after the accident 131I, 134Cs, and 137Cs were detected in these soil samples The activity and inventory of radioactive material in the eastern part of Tokyo TokyoYokohama Metropolitan Area TokyoYokohama Metropolitan Area The economy Since the war Tokyo has taken over from Ōsaka the role of leading industrial centre in the country The region has a highly diversified manufacturing base Heavy industries—such as metals, chemicals, machinery, transportation equipment, and oil refining—are concentrated in Chiba, The Tokyo metropolitan area, in the Kanto region of Japan, lies on the Okhotsk plate Historically, the city has suffered severe damage as a result of megathrust ruptures and intraplate earthquakes (M ≥ 7) caused by the dual subduction of the Philippine Sea (PHS) slab and the